diff --git a/global-requirements.txt b/global-requirements.txt
index 52aabaa9f5..647f93d287 100644
--- a/global-requirements.txt
+++ b/global-requirements.txt
@@ -142,6 +142,7 @@ pyzmq==2.2.0.1
 redis
 selenium
 sphinx>=1.1.2
+sphinxcontrib-docbookrestapi
 sphinxcontrib-httpdomain
 sphinxcontrib-pecanwsme>=0.5
 oslo.sphinx